Hydraulic-pump regulator.



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E. GRISWOLD. HYDRAULIC PUMP REGULATOR.

APPLICATION TILED DEG.12. 1906.

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UNITED STATES PATENT OFFICE.

ELY GRISWOLD, OF ERIE, PENNSYLVANIA.

HYDRAULIC-PUMP REGULATOR.

Application filed December 12.

To all whom it may concern:

{@{Be it known that 1', ELY Gniswoifn, a citizen of the United States,residing at Erie, in the county of Erie and State of Pennsylvania, haveinvented new and useful Improvements in Hydraulic-Pump Regulators, ofwhich the following is a specification.

This invention relates to hydraulic pump regulators and consists incertain improvements in the construction thereof as will be hereinafterfully described and pointed out in the claims.

More particularly the invention is adapted for use where it is desiredto maintain a constant pressure, usually through the medium of anaccumulator, under varying conditions. Where this is done, it is oftendesirable to have the accumulator near to the discharge of the systemand it is sometimes very desirable to have the pump at some distancefrom the accumulator. My invention is well adapted for such acontingency.

The invention is illustrated in the accompanying drawings as follows:

Figure 1 shows a central vertical section of an accumulator and thesteam valve of the pump. Fig. 2, a section through the pump valve andactuating device. Fi 3, a section through the valve controlling thepressure on the pump valve regulating device.

1 marks the accumulator weight; 2 the accumulator piston. This pistonpasses through the gland 3 into the cylinder 4. This cylinder issupported on the base 5. This base is provided with the stops 6 in thepath of the stops 7 on the weight. Guides 8 are arranged at each side ofthe weight 1. The lugs 9 extend from this weight into the guide. Thehigh pressure line 10 is connected with pipe 12 extends from this to acontrolling valve 13. This controlling valve has the chamber 14 fromwhich leads the pipe 12, the pipe 18 to the pressure device controllingthe pump valve and the pipe 16 forming the exhaust. The exhaustordinarily leads to what is known as the low pressure line 17. Thevalves in the valve chamber are carried by the stem 19. The valve 20 iscup shaped and operates over the inlet from the pipe 18. This isprovided with perforations 22 which may be brought into or out ofregister with the opening leading to the pipe 18. This is secured to thestem 19 by means of a nut 23. The valve 21 is provided with the packingrings 24 and operates over a cavity 25 con- Specification of LettersPatent.

Tatented Jan. 28, 1908.

1906. Serial No. 347.411.

trolling the entrance from the pipe 12. The upper end of the stem 19 isconnected with a lever 26. This lever has the throated end 27 and isfulcrumed on a swinging post 28 by means of a pin The lever is pivotedto the stem 19 by means of the pin 30. The post 28 is pivotally mountedon the chamber 14 by means of a pin 31.

The lever 26 is connected by a link 32 with an arm 33 extending from thegoverning rod 34. The governing rod is carried by the guides 35 and 36extending from the main guide 8. This is provided with a weight 37 atits lower end. of the weight having suflicient mass to actuate thevalve. A stop 38 is arranged near the upper end of the governing rod. Itcomprises the sliding stop block 39 which is slidingly mounted on therod 34, the spring 41 between the fixed block and the sliding block andthe bolt 42 which telescopingly connects the blocks 39 and but permitsof the movement of the block 39 to prevent jar.- An arm 43 extends fromthe weight 1. and is provided with an eye at its outer end. This eye isarranged on the rod 34. The stop 38 is so adjusted that the arm 43contacts the block 39 when the accumulator weight reaches its desireduppermost position. As soon as the accumulator drops away from the block39, the weight 37 returns the governing rod, thus opening the valve 13.

The pipe 18 enters the cylinder 43 of a pressure device 44. A piston 45is arranged in this cylinder and is connected by a stem 46 with the pumpvalve lever 48. The lever 48 is pivoted by means of a pin 49 on an arm50 extending from the ch amber 51 of the pump valve 52. The valve disks53 are of the ordinary balanced type and are connected with the lever 48by means of the stem 54. A weight 55 is provided at the outer end of thelever 48. The lever is provided with a series of holes 56 by means ofwhich the arm of the lever may be varied as desired. The amount ofweight necessary depends on the amount of water pressure desired in theline. The lever 48 is also connected with a dash pot 57 by means of thestem 58 so as to prevent a sudden opening of the pump valve andconsequent injury to the pump and the line. A post 59 extends upwardlyfrom the valve cap and is provided with a series of openings 60 in whichmay be arranged pins 61 and 62, limiting the downward and upwardmovement of a lever 48. The purpose of these is to control the maximumand minimum opening to the valve.

In the operation of the device, as the accumulator reaches its uppermostposition, the arm 43 contacts the stop 38 thus lifting the governing rod34. This action operating through the lever 26 depresses the stem 19.This stem is shown in the open position in Fig. 3. The depressing of thestem so moves the valve 21 as to close off the connection through thehigh pressure pipe 12 and moves the perforations 22 below the closure atthe bottom of the chamber so as to form a connection between the pipe 18and the pipe 16. When this happens, the pressure is relieved from thepressure device 44 and the weight 55, depressing the outer end of thelever 48,'

closes the pump valve 52. When the accumulator weight drops, the arm 43is carried away from the stop 38 and the rod 34 acting under theinfluence of the Weight 37, drops. This effects an upward movement ofthe stem 19 and consequent closure of the connection between the pipes18 and 16 and the opening of the connection between pipes 12 and 18, sothat pressure is turned in to the pressure device 44. This, acting onthe lever 48, lifts the outer end, of the lever and opens the valve 52so that the pump is set in motion.

It will be noted that if there is any break in the high pressure line,so that there is an absence of pressure, the pressure device 44 will notbe in operation and consequently the valve 52 will not be open. Themechanism therefore operates as a safety device, preventing the runningaway of the pump when there is any break in the line.

What I claim as new is:

1. In a hydraulic pump regulator the combination with the pump valve; ofan accumulator having its liquid controlled by said pump valve; a fluidactuated pressure device controlling said pump valve; a connection forconveying pumped fluid controlled, by the pump valve to actuate saidpressure device and means actuated by the movement of the accumulatorfor controlling the fluid actuating said device.

2. In a hydraulic pump regulator the combination with the pump valve; ofan accumulator having its liquid controlled by said pump valve; a fluidactuated pressure device controlling said pump valve; a connection forconveying pumped fluid con trolled by the pump valve to actuate saidpressure device and means actuated by the movement of the accumulatorfor controlling the pumped fluid actuating said device, said devicebeing arranged to open the pump valve as the fluid under pressure isadmitted in the pressure device and to close the valve as the pressurein the pressure device is released.

3. In a hydraulic pump regulator the combination with the pump valve; ofthe accumulator having its liquid controlled by said pump valve; a fluidactuated pressure device controlling said pump valve; a controllingvalve controlling the fluid acting on the pressure device having achamber connected with the high pressure line, with said pressure deviceand with an exhaust; valve mechanism arranged in the chamber forconnecting the high pressure line withthe pressure device with onemovement, closing said connection and opening a connection between thepressure device and exhaust with another movement; and connectionsbetween said valve mechanism and the accumulator for actuating saidvalve mechanism with the movement of the accumulator.

4. In a hydraulic pump regulator the combination with the pump valve; ofthe accumulator having its liquid controlled by said pump valve; a fluidactuated pressure device controlling said pump valve; a controllingvalve controlling the fluid acting on the pressure device having achamber connected with the high pressure line, with said pressure deviceand with an exhaust; valve mechanism arranged in the chamber forconnecting the high pressure line with the pressure device with onemovement, closing said connection and opening a connection between thepressure device and exhaust with another movement; and connectionsbetween said valve mechanism and the accumulator for actuating saidvalve mechanism with the movement of the accumulator, said pressuredevice being arranged to open the pump valve when actuating fluid isturned into the pressure device by the controlling valve and to permitthe closing of the pump valve when the actuating fluid is exhausted fromthe pressure device.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

ELY GRISWOLD. Witnesses:

J. M. SHERWIN, MATTHEW GRIswoLD, Jr.

